iio:adc:vf610-adc: Add temperature sensor support (774623ca) · Commits · 戴 / test

drivers/iio/adc/vf610_adc.c

+26 −2

Original line number	Diff line number	Diff line
		@@ -91,7 +91,7 @@
		#define VF610_ADC_CAL 0x80

		/* Other field define */
		#define VF610_ADC_ADCHC(x) ((x) & 0xF)
		#define VF610_ADC_ADCHC(x) ((x) & 0x1F)
		#define VF610_ADC_AIEN (0x1 << 7)
		#define VF610_ADC_CONV_DISABLE 0x1F
		#define VF610_ADC_HS_COCO0 0x1
		@@ -153,6 +153,12 @@ struct vf610_adc {
		BIT(IIO_CHAN_INFO_SAMP_FREQ), \
		}

		#define VF610_ADC_TEMPERATURE_CHAN(_idx, _chan_type) { \
		.type = (_chan_type), \
		.channel = (_idx), \
		.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), \
		}

		static const struct iio_chan_spec vf610_adc_iio_channels[] = {
		VF610_ADC_CHAN(0, IIO_VOLTAGE),
		VF610_ADC_CHAN(1, IIO_VOLTAGE),
		@@ -170,6 +176,7 @@ static const struct iio_chan_spec vf610_adc_iio_channels[] = {
		VF610_ADC_CHAN(13, IIO_VOLTAGE),
		VF610_ADC_CHAN(14, IIO_VOLTAGE),
		VF610_ADC_CHAN(15, IIO_VOLTAGE),
		VF610_ADC_TEMPERATURE_CHAN(26, IIO_TEMP),
		/* sentinel */
		};

		@@ -451,6 +458,7 @@ static int vf610_read_raw(struct iio_dev *indio_dev,

		switch (mask) {
		case IIO_CHAN_INFO_RAW:
		case IIO_CHAN_INFO_PROCESSED:
		mutex_lock(&indio_dev->mlock);
		reinit_completion(&info->completion);

		@@ -468,7 +476,23 @@ static int vf610_read_raw(struct iio_dev *indio_dev,
		return ret;
		}

		switch (chan->type) {
		case IIO_VOLTAGE:
		*val = info->value;
		break;
		case IIO_TEMP:
		/*
		* Calculate in degree Celsius times 1000
		* Using sensor slope of 1.84 mV/°C and
		* V at 25°C of 696 mV
		*/
		val = 25000 - ((int)info->value - 864) 1000000 / 1840;
		break;
		default:
		mutex_unlock(&indio_dev->mlock);
		return -EINVAL;
		}

		mutex_unlock(&indio_dev->mlock);
		return IIO_VAL_INT;

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